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Low Complexity Turbo-Equalization: A Clustering Approach

Kyeongyeon Kim, Jun Won Choi, Suleyman S. Kozat, Andrew C. Singer
2014 IEEE Communications Letters  
By partitioning the space of likelihood information from the decoder, based on either hard or soft clustering, and using locally-linear adaptive equalizers within each clustered region, the performance  ...  information from a channel decoder and the symbol estimates that arise in soft-input channel equalization.  ...  ADAPTIVE TURBO EQUALIZATION USING HARD OR SOFT CLUSTERED LINEAR MODELS We propose to use adaptive local linear filters to model the nonlinear dependence of the linear MMSE equalizer on the variance computed  ... 
doi:10.1109/lcomm.2014.2316172 fatcat:cyatx3jeqjbkhfv57phpw7nyfi

Linear MMSE-Optimal Turbo Equalization Using Context Trees

Kyeongyeon Kim, Nargiz Kalantarova, Suleyman Serdar Kozat, Andrew C. Singer
2013 IEEE Transactions on Signal Processing  
To date, nearly all adaptive turbo equalization methods either estimate the channel or use a direct adaptation equalizer in which estimates of the transmitted data are formed from an expressly linear function  ...  We study a class of direct adaptation turbo equalizers that are both adaptive and nonlinear functions of the soft information from the decoder.  ...  As such, direct-adaptation receivers that form an estimate of the transmitted symbols as a linear function of the received data, past decided symbols, and soft information from the decoder have emerged  ... 
doi:10.1109/tsp.2013.2256899 fatcat:4i5rbmhpu5fuzks4tqby5a4bhy

Iterative Equalization and Decoding Scheme for Underwater Acoustic Coherent Communications [chapter]

Liang Zhao, Jianhua Ge
2012 Underwater Acoustics  
That is multi-channel adaptive decision feedback equalizer, which is applied in (Kilfoyle &  ...  The effective approach to eliminate the ISI caused by multipath propagation is that adaptive decision feedback equalizer (ADFE) integrates with spatial diversity.  ...  of the coded symbols out of the decoder and the soft information about the detected symbols provided by the decision directed mode of the equalizer.  ... 
doi:10.5772/28986 fatcat:5q6rdps26zfq5nantxt2zsyxdy

Linear MMSE-Optimal Turbo Equalization Using Context Trees [article]

Nargiz Kalantarova, Kyeongyeon Kim, Suleyman S. Kozat, Andrew C. Singer
2012 arXiv   pre-print
To date, nearly all adaptive turbo equalization methods either estimate the channel or use a direct adaptation equalizer in which estimates of the transmitted data are formed from an expressly linear function  ...  We study a class of direct adaptation turbo equalizers that are both adaptive and nonlinear functions of the soft information from the decoder.  ...  As such, direct-adaptation receivers that form an estimate of the transmitted symbols as a linear function of the received data, past decided symbols, and soft information from the decoder have emerged  ... 
arXiv:1203.4168v1 fatcat:7uhv5v4hpvarxdjzr4udjx44vi

Iterative multi-channel equalization and decoding for high frequency underwater acoustic communications

Jun Won Choi, Robert J. Drost, Andrew C. Singer, James Preisig
2008 2008 5th IEEE Sensor Array and Multichannel Signal Processing Workshop  
The performance of multi-channel equalization and adaptive weight update algorithms are aided by soft information delivered from the channel decoder.  ...  The complexity of the proposed scheme is shown to be reasonable for highly reverberant underwater channels since it has linear complexity by the use of the least mean square (LMS) algorithm.  ...  The adaptive form of the turbo equalizer in [4] is therefore better suited to this application.  ... 
doi:10.1109/sam.2008.4606839 fatcat:5smgbyff2feideugdxyin56tza

Adaptive feedback equalization receiver for DS-CDMA with turbo coded systems

S. Chompoo, C. Benjangkaprasert, N. Anatrasirichai, K. Ja
2005 The 7th International Conference on Advanced Communication Technology, 2005, ICACT 2005.  
 In this paper, adaptive equalizer receiver for a turbo code direct sequence code division multiple access (DS-CDMA) by using least mean square (LMS) adaptive algorithm is presented.  ...  The proposed adaptive equalizer is using soft output of decision feedback adaptive equalizer (DFE) to examines the output of the equalizer and the Log-maximum a posteriori (Log-MAP) algorithm for the turbo  ...  In this paper proposes a new adaptive equalizer based on decision feedback equalizer using soft output to calculates the output of the equalizer and the Log-MAP algorithm for the turbo decoding process  ... 
doi:10.1109/icact.2005.246143 fatcat:erxba5khmzaddnbh6hxr2e2hse

Optimizing GNSS navigation data message decoding in urban environment

Marion Roudier, Thomas Grelier, Lionel Ries, Axel Garcia-Pena, Olivier Julien, Charly Poulliat, Marie-Laure Boucheret, Damien Kubrak
2014 2014 IEEE/ION Position, Location and Navigation Symposium - PLANS 2014  
to the urban propagation channel to avoid mismatched decoding when using soft input channel decoding.  ...  This advanced detection function takes into account some a priori information on the available Channel State Information (CSI).  ...  Subframe 1 is formed by 9 information bits and provides the Time Of Arrival (TOI).  ... 
doi:10.1109/plans.2014.6851419 fatcat:tvxklqmoajan3dxsrdamsqpcfe

The Bootstrap Widrow-Hoff Rule as a Cluster-Formation Algorithm

Geoffrey E. Hinton, Steven J. Nowlan
1990 Neural Computation  
The most tractable step in this direction is to assume the mixing proportions are fixed and equal and to allow the variances to adapt subject to the constraint that they remain equal.  ...  for adaptive equal- ization can be extended to more complex networks and gives rise to a new class of unsupervised learning procedures in which the objective of forming tight clusters is used to generate  ... 
doi:10.1162/neco.1990.2.3.355 fatcat:akfxatr2sne65hcfdfepfmqmci

Robust Image Restoration Matched With Adaptive Aperture Formation In Radar Imaging Systems With Sparse Antenna Arrays

Ivan Prudyus, Sviatoslav Voloshynovskiy, Taras Holotyak
1998 Zenodo  
We propose to use the robust adaptive iterative image restoration approach [3, 4, 5] which has a lot of advantages over the rest of known methods due to its ability to incorporate a priori information  ...  , adaptive image pre-filtering using modified L-estimator, adaptive regularization and parametric constrains on the solution.  ... 
doi:10.5281/zenodo.36552 fatcat:2kvxy7yoarhdva2ppbpcxywolq

Adaptive bayesian and em-based detectors for frequency-selective fading channels

M. Nissila, S. Pasupathy
2003 IEEE Transactions on Communications  
soft decision directed (SDD) channel estimators.  ...  In this paper, the problem of adaptive maximum a posteriori (MAP) symbol detection for the uncoded transmission as well as the problem of adaptive soft-input soft-output (SISO) demodulation for the coded  ...  soft decision directed (SDD) channel estimators.  ... 
doi:10.1109/tcomm.2003.815050 fatcat:tfnxa4empnhxlkutwcrumpbwmi

Transdisciplinary methods of the future physical culture teacher's soft skills competencies formation

Vladislav Zhabakov, Tatiana Zhabakova, Larisa Kravtsova, Z. Kuznetsova, A. Kuznetsov, R. Nagovitsyn, B. Shustin, G. Drandrov, A. Pyanzin, I. Gibadullin, E. Vrublevskiy, A. Gorelov
2020 BIO Web of Conferences  
The forming experiment was held in natural conditions and was directed toward studying the effectiveness of competencies soft skills formation transdisciplinary methods.  ...  , situatedness, cooperativity, longitudness, directivity.  ...  It creates the conditions for effective adaptation, self-test in quasiprofessional acivity during pedagogical practice, using situatedness of soft skills competencies in the definite activity.  ... 
doi:10.1051/bioconf/20202600021 fatcat:kmywpwdt2zfevjltvwtzsnsbg4

Adaptive MMSE multiuser detection for MIMO OFDM over Turbo-Equalization for Single-Carrier Transmission wireless channel

Titus Eneh, Predrag Rapajic, Grace Oletu, Kwashie Anang, Lawal Bello
2011 2011 7th International Wireless Communications and Mobile Computing Conference  
Adaptive multiuser receivers scheme for MIMO OFDM over Iterative-Equalization for Single-Carrier Transmission, which we refer to as Iterative AMUD MIMO OFDM.  ...  It involves the joint iteration of the adaptive minimum mean square error multiuser detection and decoding algorithm with prior information of the channel and interference cancelation in the spatial domain  ...  Also in the equalizer output the extrinsic information is extracted from the output as follows: This equalizer information is again used in the SISO decoder to produce new soft outputs and furthermore,  ... 
doi:10.1109/iwcmc.2011.5982744 dblp:conf/iwcmc/EnehROAB11 fatcat:fjjutxmesvek5jmhgiyqoyck3y

Reconfigurable Design for Omni-adaptive Grasp Learning [article]

Fang Wan, Haokun Wang, Jiyuan Wu, Yujia Liu, Sheng Ge, Chaoyang Song
2020 arXiv   pre-print
In this paper, we adopt the reconfigurable design of the robotic gripper using a novel soft finger structure with omni-directional adaptation, which generates a large number of possible gripper configurations  ...  Such reconfigurable design with these omni-adaptive fingers enables us to systematically investigate the optimal arrangement of the fingers towards robust grasping.  ...  The proposed soft finger achieves omni-directional adaptation through a layered network structure with a converging form from the base towards the tip.  ... 
arXiv:2003.01582v1 fatcat:k7d7x5vvvncjlb2ij662qre37y

Nonlinear turbo equalization using context trees

Nargiz Kalantarova, Kyeongyeon Kim, Suleyman S. Kozat, Andrew C. Singer
2011 2011 Information Theory and Applications Workshop  
In this paper, we study adaptive nonlinear turbo equalization to model the nonlinear dependency of a linear minimum mean square error (MMSE) equalizer on soft information from the decoder.  ...  with the computational complexity of a single adaptive linear equalizer.  ...  In this paper, we propose a novel adaptive turbo equalization framework where the nonlinear dependence of the linear MMSE turbo equalization on the soft information from the decoder is modeled using piecewise  ... 
doi:10.1109/ita.2011.5743608 dblp:conf/ita/KalantarovaKKS11 fatcat:uwkt4nhg3nd23g627oxfgwaite

Joint turbo equalization and channel estimation with fixed-lag extended Kalman filtering

Xin Li, T.F. Wong
2006 IEEE Wireless Communications and Networking Conference, 2006. WCNC 2006.  
In the receiver, a fixed-lag Kalman equalizer jointly estimates the channel and equalizes the data symbols with the assistance of a priori information supplied by the decoder.  ...  Performance comparison with different types of turbo equalizers demonstrates the advantage of the proposed turbo equalizer.  ...  We note that in this case, the LE-RLS equalizer always fails (BER=0.5) for any choice of filter length K.  ... 
doi:10.1109/wcnc.2006.1696517 dblp:conf/wcnc/LiW06 fatcat:w652goy6q5d37lxgs4s2dvlikq
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